Starting this week Twitter has rolled out a new update in an attempt to save itself from it's tumbling stock prices by monetizing user data and advertising. The strategy is a multi-pronged approach that focuses on maintaining it's user base while bombarding them with targeted advertisements and selling their data to third parties in the most transparent manner possible. The new privacy agreement surrounding this misuse of user data will be made available by early June. In the meantime Twitter has provided a new settings tab called "Your Twitter Data" which shows you just how intrusive the data being gathered on you really is.
To begin with, you can now see the last 30 or so logins along with the recorded location, IP address, and device/browser used. There is also a "Places you've been" section which is separate from any tweet location data. And while you can delete the places you've been, the log of IPs and Devices seems to be permanent.
You can also see Audiences and Advertisements that are targeting you and select what kind of advertisements you'd like to receive. You can also request a list of advertisers that have your usage information, which twitter will email to you, but you cannot revoke their access to your data without, presumably, contacting these companies directly, of which their can be hundreds depending on your account age and interactions.
It's recommend you manually delete all Twitter data in these sections listed above and disable the data collection completely while this is still an option. Come mid June when the new privacy agreement comes out you may no longer have this option.
The last Twitter "feature" seems to be a new approach to punishing users who break rules. Now, rather than outright suspending users or restricting them from logging in, the new account restrictions prevent you from doing anything but sending text-only DMs to your followers. These restrictions are also longer than previous restrictions, with some users reporting week long restrictions on account activity. Users are unable to follow, tweet, re-tweet, or even like posts without receiving a reminder about the restrictions still in effect.
Although this all appears to be an attempt to keep users - rather than just suspending them - the combination of Draconian account restrictions along with increased advertisements and the selling of user data really shows just how desperate and disconnected Twitter is at this point. It's very likely that Twitter will not exist in it's current form by this time next year - if it is to survive at all.